G1: "Other" time too long ?

[Yu Zhang]

Simone,

The formula is correct.  But with 16M region size, you get 256(base)*5 
entries.
Also with bigger region size, you might get less Remember set 
references.  So bigger chance not seeing coarsening.

Thanks,
Jenny

On 12/11/2014 10:16 AM, Simone Bordet wrote:
> I did not have G1SummarizeRSetStats for the case with region_size = 16
> MiB, but I do have it for the case region_size = 2 MiB.
> I can see coarsenings in the latter case, so I guess it will be more
> so for the former case, but I'll verify it.
> The coarsenings I see are in the order 400-500 with peaks in the
> thousands and one big at 289509.
>
> I see that the formula to calculate the region entries is:
>
> table_size = base * (log(region_size / 1M) + 1)
>
> so for a 16 MiB region size the region entries are 564.
>
> I'll retry with a higher value to see if I get any benefit.